Nitecore's UM10 is not only compact, it has a winder integrated into the unit so you can keep the USB cable out of the way when not in use!

Nitecore's design team also integrated a secondary USB port so you can charge your smartphone, or other device while you charge your battery. The intelligent micro controller allows you to select a priority device, and if there is not enough power for both, it will charge the priority device first.